Prosecution Insights
Last updated: October 04, 2026
Application No. 18/002,858

TOP CAP ASSEMBLY AND BATTERY STRUCTURE

Non-Final OA §102§103
Filed
Feb 22, 2024
Priority
Aug 17, 2022 — CN 202222160478.3 +1 more
Examiner
RHEE, JANE J
Art Unit
Tech Center
Assignee
Eve Power Co., Ltd.
OA Round
1 (Non-Final)
86%
Grant Probability
Favorable
1-2
OA Rounds
1m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allowance Rate
977 granted / 1136 resolved
+26.0% vs TC avg
Moderate +12% lift
Without
With
+12.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
20 currently pending
Career history
1153
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
51.5%
+11.5% vs TC avg
§102
37.5%
-2.5% vs TC avg
§112
2.1%
-37.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1136 resolved cases

Office Action

§102 §103
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1,3,5-6,9-11,14,16 is/are rejected under 35 U.S.C. 102(a) as being anticipated by Liu et al. (CN215578675, translation found in IDS 2/7/24). As to claim 1, Liu et al. discloses a top cap assembly (figure 5), applied to a battery comprising a housing (5) having a mounting hole, the top cap assembly passing through the mounting hole of the housing (figure 5), wherein the top cap assembly comprises (figure 2): a pole (1), wherein the pole is provided with an annular groove (11) recessed in a radial direction; a sealing element (22), wherein the sealing element (22) is sleeved on the pole (1) and positioned in the annular groove (11), the sealing element (22) is sandwiched between the housing (5) and a groove wall of the annular groove (11), and the sealing element (22) is partially positioned outside the housing (5); and a plastic element (21), wherein the plastic element is sleeved on the sealing element (22) and positioned outside the housing (5), and the plastic element (21) is partially sandwiched between the housing (5) and the groove wall of the annular groove (11). As to claim 3, Liu et al. discloses, wherein the plastic element (figure 2 number 21) comprises an inner ring (212) and an outer ring (21) connected to each other, and wherein the inner ring (212) is sandwiched between the groove wall of the annular groove (11) and the housing (5) and lap-jointed with the sealing element (22), the outer ring (212) is positioned outside the annular groove (11) and positioned around an outer side of the pole (1), and a gap is defined between the outer ring (21) and an outer peripheral surface of the pole (1). As to claim 5, Liu et al. discloses wherein the sealing element (figure 2 number 22) comprises a first sealing element (22) and a second sealing element (23), and wherein the first sealing element (22) is lap-jointed with the inner ring (212), at least one of the first sealing element (22) and the second sealing element (23) comprises a bending portion (23), the first sealing element (22) and the second sealing element (23) are abutted by the bending portion (23), and the bending portion is sandwiched between a groove bottom of the annular groove (11) and the housing (5). As to claim 6, Liu et al. discloses wherein a limiting groove (figure 2 number 11) is defined on the groove wall of the annular groove (11), a limiting protrusion (14) is disposed on the inner ring (212), the inner ring is sandwiched between the housing (5) and the groove wall of the annular groove (11), and the limiting protrusion (14) is positioned in the limiting groove (11). As to claim 9, Liu et al. discloses further comprising a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). As to claim 10, Liu et al. discloses a battery structure, comprising a cell (figure 5), a housing (5), a bottom cap assembly, and a top cap assembly wherein the cell is positioned in the housing (5), and the top cap assembly and the bottom cap assembly are disposed at both ends of the housing, respectively, and the top cap assembly comprises (figure 2): a pole (1), wherein the pole is provided with an annular groove (11) recessed in a radial direction; a sealing element (22), wherein the sealing element is sleeved on the pole and positioned in the annular groove (11), the sealing element (22) is sandwiched between the housing and a groove wall of the annular groove (11), and the sealing element (22) is partially positioned outside the housing; and a plastic element (21), wherein the plastic element is sleeved on the sealing element (22) and positioned outside the housing, and the plastic element (21) is partially sandwiched between the housing and the groove wall of the annular groove (11). As to claim 11, Liu et al. discloses wherein the bottom cap assembly comprises a bottom cap plate and a negative current collector disposed in a stacked manner, the bottom cap assembly abuts against the cell by the negative current collector, and the bottom cap assembly is connected with the housing by the bottom cap plate (paragraph 0002 and fig 4). As to claim 14, Liu et al. discloses, wherein the plastic element (figure 2 number 21) comprises an inner ring (212) and an outer ring (21) connected to each other, and wherein the inner ring (212) is sandwiched between the groove wall of the annular groove (11) and the housing (5) and lap-jointed with the sealing element (22), the outer ring (212) is positioned outside the annular groove (11) and positioned around an outer side of the pole (1), and a gap is defined between the outer ring (21) and an outer peripheral surface of the pole (1) wherein a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). As to claim 16, Liu et al. discloses, wherein the plastic element (figure 2 number 21) comprises an inner ring (212) and an outer ring (21) connected to each other, and wherein the inner ring (212) is sandwiched between the groove wall of the annular groove (11) and the housing (5) and lap-jointed with the sealing element (22), the outer ring (212) is positioned outside the annular groove (11) and positioned around an outer side of the pole (1), and a gap is defined between the outer ring (21) and an outer peripheral surface of the pole (1), wherein the sealing element (figure 2 number 22) comprises a first sealing element (22) and a second sealing element (23), and wherein the first sealing element (22) is lap-jointed with the inner ring (212), at least one of the first sealing element (22) and the second sealing element (23) comprises a bending portion (23), the first sealing element (22) and the second sealing element (23) are abutted by the bending portion (23), and the bending portion is sandwiched between a groove bottom of the annular groove (11) and the housing (5) wherein a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). As to claim 17, Liu et al. discloses wherein the plastic element (figure 2 number 21) comprises an inner ring (212) and an outer ring (21) connected to each other, and wherein the inner ring (212) is sandwiched between the groove wall of the annular groove (11) and the housing (5) and lap-jointed with the sealing element (22), the outer ring (212) is positioned outside the annular groove (11) and positioned around an outer side of the pole (1), and a gap is defined between the outer ring (21) and an outer peripheral surface of the pole (1), wherein a limiting groove (figure 2 number 11) is defined on the groove wall of the annular groove (11), a limiting protrusion (14) is disposed on the inner ring (212), the inner ring is sandwiched between the housing (5) and the groove wall of the annular groove (11), and the limiting protrusion (14) is positioned in the limiting groove (11), wherein a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 2,4,7-8,12-13,15,,18-20 is/are rejected under 35 U.S.C. 103 as being unpatentable over Liu et al. in view of Ning (CN113991186, translation from IDS 2/7/24). Liu et al. discloses a top cap assembly described above. As to claim 2, Liu et al. fail to disclose wherein a hardness of the plastic element is greater than a hardness of the sealing element. Ning teaches the plastic element as an insulating plate and an insulating pad as a sealing element is made of fluororubber for the purpose of providing sealing function and (paragraph 0095). Therefore, it would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with wherein a hardness of the plastic element is greater than a hardness of the sealing element for the purpose of providing optimal materials for optimal value in absence of unexpected results. As to claim 4, Liu et al. fail to disclose wherein, in the radial direction of the pole, the gap has a size of a in the range of 0.1mm to 0.5mm, the outer ring has a width of b in the range of 0.4mm to 1mm, and a lap length of the inner ring and the sealing element is c in the range of 0.8mm to 3mm. Liu et al. discloses a similar shaped pole in figure 2 but does not specify ranges of the gap, outer ring or lap length of the inner ring and sealing element. It would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with wherein, in the radial direction of the pole, the gap has a size of a in the range of 0.1mm to 0.5mm, the outer ring has a width of b in the range of 0.4mm to 1mm, and a lap length of the inner ring and the sealing element is c in the range of 0.8mm to 3mm in order to provide optimal results in absence of unexpected results. As to claim 7-8, Liu et al. fail to disclose, further comprising a metal pressing ring wherein the metal pressing ring is sleeved on the pole and positioned in the annular groove, the metal pressing ring abuts against the sealing element and is positioned at a side of the sealing element away from the plastic element, and the housing presses the sealing element and the metal pressing ring against the groove wall of the annular groove, wherein the metal pressing ring and the pole are welded. Ning teaches a metal pressing ring wherein the metal pressing ring is sleeved on the pole and positioned in the annular groove, the metal pressing ring abuts against the sealing element and is positioned at a side of the sealing element away from the plastic element, and the housing presses the sealing element and the metal pressing ring against the groove wall of the annular groove, wherein the metal pressing ring and the pole are welded for the purpose of achieving the connection between the positive electrode post and the housing and ensures the positive electrode and housing are insulated from each other (paragraph 0097,0079). Therefore, it would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with a metal pressing ring wherein the metal pressing ring is sleeved on the pole and positioned in the annular groove, the metal pressing ring abuts against the sealing element and is positioned at a side of the sealing element away from the plastic element, and the housing presses the sealing element and the metal pressing ring against the groove wall of the annular groove, wherein the metal pressing ring and the pole are welded for the purpose of achieving the connection between the positive electrode post and the housing and ensures the positive electrode and housing are insulated from each other (paragraph 0097,0079). As to claim 12, Liu et al. fail to disclose, wherein a surface of the bottom cap plate facing the negative current collector is convexly provided with a first convex portion a surface of the negative current collector facing the bottom cap plate is convexly provided with a second convex portion the first convex portion abuts against the second convex portion and the second convex portion is configured to adjust a distance between the negative current collector and the bottom cap plate. Ning teaches , wherein a surface of the bottom cap plate facing the negative current collector is convexly provided with a first convex portion a surface of the negative current collector facing the bottom cap plate is convexly provided with a second convex portion the first convex portion abuts against the second convex portion and the second convex portion is configured to adjust a distance between the negative current collector and the bottom cap plate for the purpose of casing to serve as the negative terminal of the battery (paragraph 0034). Therefore, it would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to Liu et al. with wherein a surface of the bottom cap plate facing the negative current collector is convexly provided with a first convex portion a surface of the negative current collector facing the bottom cap plate is convexly provided with a second convex portion the first convex portion abuts against the second convex portion and the second convex portion is configured to adjust a distance between the negative current collector and the bottom cap plate for the purpose of casing to serve as the negative terminal of the battery (paragraph 0034). As to claim 13, Liu et al. discloses further comprising a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). , Liu et al. fail to disclose wherein a hardness of the plastic element is greater than a hardness of the sealing element. Ning teaches the plastic element as an insulating plate and an insulating pad as a sealing element is made of fluororubber for the purpose of providing sealing function and (paragraph 0095). Therefore, it would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with wherein a hardness of the plastic element is greater than a hardness of the sealing element for the purpose of providing optimal materials for optimal value in absence of unexpected results. As to claim 15, Liu et al. discloses wherein the plastic element (figure 2 number 21) comprises an inner ring (212) and an outer ring (21) connected to each other, and wherein the inner ring (212) is sandwiched between the groove wall of the annular groove (11) and the housing (5) and lap-jointed with the sealing element (22), the outer ring (212) is positioned outside the annular groove (11) and positioned around an outer side of the pole (1), and a gap is defined between the outer ring (21) and an outer peripheral surface of the pole (1), and further comprising a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). Liu et al. fail to disclose wherein, in the radial direction of the pole, the gap has a size of a in the range of 0.1mm to 0.5mm, the outer ring has a width of b in the range of 0.4mm to 1mm, and a lap length of the inner ring and the sealing element is c in the range of 0.8mm to 3mm. Liu et al. discloses a similar shaped pole in figure 2 but does not specify ranges of the gap, outer ring or lap length of the inner ring and sealing element. It would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with wherein, in the radial direction of the pole, the gap has a size of a in the range of 0.1mm to 0.5mm, the outer ring has a width of b in the range of 0.4mm to 1mm, and a lap length of the inner ring and the sealing element is c in the range of 0.8mm to 3mm in order to provide optimal results in absence of unexpected results. As to claim 18-19, Liu et al. discloses further comprising a positive current collector (figure 2 number 3) and an inner insulating sheet (23), wherein the positive current collector (3) is disposed on a cell of the battery, the pole (1) passes through the mounting hole and presses the positive current collector (3), and the inner insulating sheet (23) is sandwiched between the positive current collector (3) and an inner wall of the housing (5). Liu et al. fail to disclose, further comprising a metal pressing ring wherein the metal pressing ring is sleeved on the pole and positioned in the annular groove, the metal pressing ring abuts against the sealing element and is positioned at a side of the sealing element away from the plastic element, and the housing presses the sealing element and the metal pressing ring against the groove wall of the annular groove, wherein the metal pressing ring and the pole are welded. Ning teaches a metal pressing ring wherein the metal pressing ring is sleeved on the pole and positioned in the annular groove, the metal pressing ring abuts against the sealing element and is positioned at a side of the sealing element away from the plastic element, and the housing presses the sealing element and the metal pressing ring against the groove wall of the annular groove, wherein the metal pressing ring and the pole are welded for the purpose of achieving the connection between the positive electrode post and the housing and ensures the positive electrode and housing are insulated from each other (paragraph 0097,0079). Therefore, it would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with a metal pressing ring wherein the metal pressing ring is sleeved on the pole and positioned in the annular groove, the metal pressing ring abuts against the sealing element and is positioned at a side of the sealing element away from the plastic element, and the housing presses the sealing element and the metal pressing ring against the groove wall of the annular groove, wherein the metal pressing ring and the pole are welded for the purpose of achieving the connection between the positive electrode post and the housing and ensures the positive electrode and housing are insulated from each other (paragraph 0097,0079). As to claim 20, Liu et al. fail to disclose wherein a hardness of the plastic element is greater than a hardness of the sealing element. Ning teaches the plastic element as an insulating plate and an insulating pad as a sealing element is made of fluororubber for the purpose of providing sealing function and (paragraph 0095). Therefore, it would have been obvious to one having ordinary skill in the art at the time applicant's invention was made to provide Liu et al. with wherein a hardness of the plastic element is greater than a hardness of the sealing element for the purpose of providing optimal materials for optimal value in absence of unexpected results. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JANE J RHEE whose telephone number is (571)272-1499. The examiner can normally be reached Monday-Friday (10-6:30). Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Miriam Stagg can be reached at 571-270-5256. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /JANE J RHEE/ Primary Examiner, Art Unit 1724
Read full office action

Prosecution Timeline

Feb 22, 2024
Application Filed
Aug 31, 2026
Non-Final Rejection mailed — §102, §103 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
86%
Grant Probability
98%
With Interview (+12.4%)
2y 9m (~1m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1136 resolved cases by this examiner. Grant probability derived from career allowance rate.

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